Scalable e-Learning Multimedia Adaptation Architecture

Abstract

Abstract.A neglected challenge in existing e-Learning (eL) systems is providing access to multimedia to all users regardless of environmental conditions such as diverse device capabilities, the heterogeneity of the underlying IP network, and user modality preference. This paper proposes a novel two-tier transcoding framework capable of adapting eL multimedia to meet the end-user environmental challenges. This two-tier architecture consists of 1)an application layer transcoder that adapts the presentation format of the eL content as viewed in a browser to meet device capabilities and user modality preference, 2) a bitstream transcoder that transforms multimedia streams to conform to the device's processing capabilities and to adapt the encoding rate to meet the network's fluctuating bandwidth. Results demonstrate the eL multimedia transcoding for mobile devices and its low overhead delays.

An export architecture for a multimedia authoring environment

“…A future step in the use of this architecture will be to consider more advanced publications needs such as those required for rendering adapted multimedia content, taking into account user needs or user context [1], [6].…”

Adaptation Oriented "Resource" Modeling for Course-based E-learning Environment

“…The adaption mechanism of e-learning content must address to meet device and user preference needs [12]. An important issue in an adaptive e-learning domain is the discovery of suitable learning resources as per the different contextual and cognitive needs of e-learner so that, the metadata information of e-learning content can be categorized as shown in " Fig.…”